Oxygen vacancy enhanced photostability and activity of plasmon-Ag composites in the visible to near-infrared region for water purification

doi:10.1016/j.apcatb.2016.06.037

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院饮用水科学与技术重点实验室

	Oxygen vacancy enhanced photostability and activity of plasmon-Ag composites in the visible to near-infrared region for water purification
	Zhang, Lili; Ji, Huanhuan; Lyu, Lai; An, Xiaoqiang; Hu, Chun
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2016-12-15
卷号	199 期号:0 页码:230-240
关键词	Oxygen Vacancy Interfacial Charge Transfer Plasmonic-ag Composites Ag++ Releasing Entire Solar Spectrum
DOI	10.1016/j.apcatb.2016.06.037
英文摘要	Solid solution of BiOBr and BHO (BiO(OH)(0.06)Br-0.94) with abundant oxygen vacancies was supported on Ag/AgBr using precipitation and deposition-precipitation methods. The photocatalyst showed high and stable photocatalytic activity for the degradation of chlorophenols and azodyes in water under visible to NIR light irradiation without any release of Ag+, which came from visible-excited AgBr and the SPR of Ag NPs in the:visible and NIR region. The different interfacial charge-transfer processes were verified on the basis of cyclic voltammetry analyses and all experimental information. The conduction band (CB) electrons of photoexcited AgBr reacted with the adsorbed oxygen forming O-2(center dot-), while the valence band (VB) holes of AgBr were transported the VB of BiO(OH)(0.06)Br-0.94 to oxidize organic pollutants or H2O to (OH)-O-center dot. The plasmon-induced electrons from Ag NPs transferred to the CB of AgBr reacting with the adsorbed oxygen to O-2(center dot-), while the electrons trapped on the oxygen vacancies of BiO(OH)(0.06)Br-0.94 transferred to Ag NPs recombining with the plasmon-induced holes, inhibiting the release of Ag+, and the resulted VB holes of BiO(OH)(0.06)Br-0.94 oxidized organic compound. These interfacial charge transfers. evidenced the high photOactivity and photostability of BiO(OH)(0.06)Br-0.94/Ag/AgBr. (C) 2016 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/36204]
专题	生态环境研究中心_中国科学院饮用水科学与技术重点实验室
推荐引用方式 GB/T 7714	Zhang, Lili,Ji, Huanhuan,Lyu, Lai,et al. Oxygen vacancy enhanced photostability and activity of plasmon-Ag composites in the visible to near-infrared region for water purification[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2016,199(0):230-240.
APA	Zhang, Lili,Ji, Huanhuan,Lyu, Lai,An, Xiaoqiang,&Hu, Chun.(2016).Oxygen vacancy enhanced photostability and activity of plasmon-Ag composites in the visible to near-infrared region for water purification.APPLIED CATALYSIS B-ENVIRONMENTAL,199(0),230-240.
MLA	Zhang, Lili,et al."Oxygen vacancy enhanced photostability and activity of plasmon-Ag composites in the visible to near-infrared region for water purification".APPLIED CATALYSIS B-ENVIRONMENTAL 199.0(2016):230-240.